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Chem."],"accepted":{"date-parts":[[2018,6,4]]},"abstract":"<jats:p>\n                    Two new series of tricyclic heterocycles, namely 5,6-dihydro-4\n                    <jats:italic>H<\/jats:italic>\n                    -benzo[\n                    <jats:italic>b<\/jats:italic>\n                    ][1,2,4]triazolo[1,5-\n                    <jats:italic>d<\/jats:italic>\n                    ][1,4]diazepinium salts\n                    <jats:bold>10<\/jats:bold>\n                    and the related neutral, free bases\n                    <jats:bold>13<\/jats:bold>\n                    were synthesized from 4-acetoxy-1-acetyl-4-phenylazo-1,2,3,4-tetrahydroquinolines\n                    <jats:bold>8<\/jats:bold>\n                    and nitriles\n                    <jats:bold>9<\/jats:bold>\n                    in the presence of aluminium chloride by the [3\n                    <jats:sup>+<\/jats:sup>\n                    + 2]-cycloaddition reaction of the in situ generated azocarbenium intermediates\n                    <jats:bold>14<\/jats:bold>\n                    followed by a ring-expansion rearrangement. In the rearrangement reaction, the phenyl substituent in the initially formed spiro-triazolium adducts\n                    <jats:bold>16<\/jats:bold>\n                    underwent a [1,2]-migration from C(3) to the electron-deficient N(2). This led to the ring expansion from 6-membered piperidine to 7-membered diazepine furnishing the tricyclic 1,2,4-triazole-fused 1,4-benzodiazepines.\n                  <\/jats:p>","DOI":"10.3762\/bjoc.14.155","type":"journal-article","created":{"date-parts":[[2018,7,18]],"date-time":"2018-07-18T10:18:27Z","timestamp":1531909107000},"page":"1826-1833","source":"Crossref","is-referenced-by-count":4,"title":["Synthesis of new tricyclic 5,6-dihydro-4\n                    <i>H<\/i>\n                    -benzo[\n                    <i>b<\/i>\n                    ][1,2,4]triazolo[1,5-\n                    <i>d<\/i>\n                    ][1,4]diazepine derivatives by [3\n                    <sup>+<\/sup>\n                    + 2]-cycloaddition\/rearrangement 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